Show simple item record

dc.creatorForestell, Amy Dove
dc.date.accessioned2009-10-23T16:31:12Z
dc.date.available2009-10-23T16:31:12Z
dc.date.created2009-08
dc.date.issued2009-10-23T16:31:12Z
dc.identifier.urihttp://hdl.handle.net/2152/6641
dc.descriptiontext
dc.description.abstractDark matter is now accepted as an integral part of our universe, and galaxy dynamics have long provided the most convincing observational evidence for dark matter. Spiral galaxies have traditionally been used for these studies because of their more simple kinematics, however elliptical galaxies need to be understood as well. In this dissertation I present deep long-slit spectroscopy from the University of Texas’ Hobby-Eberly Telescope for a sample of elliptical galaxies. For a subsample of galaxies I fit axisymmetric orbit-superposition models with a range of dark halo density profiles. I find that all three galaxies modeled require a significant dark halo to explain their motions. However, the shape of the dark halo is not the expected NFW profile, but rather a profile with a flat central slope. I also discuss the galaxy masses, anisotropies, and stellar mass-to-light ratios.en_US
dc.format.mediumelectronic
dc.language.isoengen_US
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.
dc.subjectDark matteren_US
dc.subjectElliptical galaxiesen_US
dc.subjectDeep long-slit spectroscopyen_US
dc.subjectDark halosen_US
dc.subjectHobby-Eberly telescopeen_US
dc.subjectAxisymmetric orbit-superposition modelsen_US
dc.subjectGalaxy massesen_US
dc.subjectAnisotropiesen_US
dc.subjectStellar mass-to-light ratiosen_US
dc.titleExploring the dynamics and dark halos of elliptical galaxies at large radiien_US
dc.description.departmentAstronomyen_US
thesis.degree.departmentAstronomyen_US
thesis.degree.disciplineAstronomyen_US
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US


Files in this item

Icon

This item appears in the following Collection(s)

Show simple item record